Never heard of shaving to cause any sort of permanent hair loss, it inherently leaves the follicles intact unlike waxing/plucking. The bits I shave certainly need to be kept up to keep the stubble at bay (that was T.M.I wasn't it )
However I have read articles stating that eyebrows repeatedly plucked over a period of time can lead to a permanent lack of re growth. Can't vouch for this myself, the most mine get is a bit of 'trimmer topiary' from time to time